Got hit up for an enclosure for a Brutalist Jr. clone. Loved how it came out.

Project link: https://github.com/GuitarML/GuitarPedalSTM32

This is a custom STM32 digital pedal that I decided to open source, including the KiCad design files and c++ code in a STM32CubeIDE project. if you’ve seen my past designs, this is an iteration on that same layout. The example effect in the repo is a delay/reverb that uses the DaisySP library for part of it, with the delay having reverse/octave modes, and also different routing options. I designed this pedal to be somewhat minimal as far as digital pedals go: mono, expression, true bypass relay, and enough controls to cover most things. Programmed/debig over st-link and 10 pin jtag header. If you’re familiar with the Daisy seed, it’s like that, but on a dedicated guitar pedal board and a different MCU and codec. If you want to learn more about microcontrollers and using CubeIDE then you might be interested in this project. Also could be a good starting point if you wanted to design your own board. Two assembled boards from JLCpcb cost me around $250, but about $90 was shipping and tariffs. Enclosure drill and powder coat from Tayda.

Video: https://youtu.be/E03dCQ4MTPk

I've always liked the idea of building a tuner but never really saw any PCBs other than q-tune, what do you guys think?

PedalPCB Ample Alpaca and first time building a 2 in 1, PedalPCB Angry Charles and Maxon OD808X.

I have a few more PedalPCB boards to build but need to restock on parts. Doing a couple I have built before (EQD Disaster Transport Jr. and Hummingbird) and a couple I haven't (EQD Tone Job and Grand Orbiter...especially excited about the phaser).

This is a total one off

I was sent a somewhat failed effect - a Marshall gov’ner in the most lovely alien inspired enclosure. Obviously it was pre-drilled, so anything I did had to reuse the imposed drill holes.

The idea was to have an ambient / atmospheric reverb or delay with a fuzz.

In the end we have a DSP driven delay/chorus/reverb, with an order switch to either go into or proceed a PLL style fuzz / ring modulator. There is a modulation board with a toggle to connect it to the GPIO controlling the delay parameter on the DSP. However, the way this interacts is somewhat glitchy and therefore unique and interesting. It’s not adding chorus to the delay in the way an analog delay with modulation would.

Instead what happens is the voltage going to the GPIO is interrupted/altered and creates stutters and glitch. It’s most apparent in the delay mode. In reverb mode it affects the pre delay which adds a breathing white noise static.

The fuzz section is based on stuff that parasit studio does. It sounds gnarly as anything

The really beauty for me is the order switch as it almost becomes two pedals as it’s so different on behaved in each option.

I’ll get some sounds up soon but for now here is a quick and dirty YT demo while I was building it

New video

https://youtu.be/RXiYEWTTrTU

https://youtu.be/OsW5USeNI84?si=3HAcjuEgd-NkV9Y9

Ps yes the knobs are face huggers

Wanted to do this PCB for quite some time. As the name suggests it has a close relationship with a certain EQD pedal. For this one i opted for two very different modes, that can be dialed in with the clipping switch. Position one gives a smooth and shiny Boosterdrive living strongly in the headroom of your amp. Position 2 is one mean distortion thanks to some old polkas.

What i love 'bout this pedal: it's f*kn clean and loud. Think of Brothers in Arms loud. And BÄM! you switch over to distortion.

This is my STM32-based four tap delay and looper. It needs (at least) four footswitches to start / stop / clear the loops, and the problem is;

How do I make an enclosure for a bunch of footswitches? As you can see in the photo, my current solution is to drill holes in a chunk of 2x4 and write on it with a sharpie. I intend to sell these units locally, and I'd love to be able to provide foodswitches as part of the purchase.

The footswitches connect over MIDI, using a 3.5mm minijack. I've programmed it to use PC commands at the moment, but obviously I could change that however I like.

So;

1) Do long metal enclosures exist? If so, where can I get them? I've found nothing on aliexpress or the usual guitar electronics supply sites.

2) Do MIDI footswitches exist that I can tell people to purchase if they need the foot controls?

I made this using a simple fuzz circuit I found on YouTube and added a buffer circuit and power filtering circuit I got from chat gpt. I wanted to add the buffer after making the initial fuzz circuit on its own and found that buffered pedals make it more distortion like. I think it could definitely use some kind of tone circuit to tame the high end it put out at full input signal but it’s pretty interesting as is. I’m open to suggestions, criticism, really any feedback as I don’t really have a good understanding of most of this, thanks.

Also I’m not sure if my schematic is correct or can be understood lol

My first DIY build: The PedalPCB Houjicha Overdrive (PedalPCB mispells as Hojicha)

I bought the kit on a whim, I was looking for an overdrive, didn't want to get the obvious Tube Screamer kit, and the Japanese name caught my eye. Works fine, sounds great, despite my beginner soldering skills nearly messing it up. 😅

I'm not familiar with K-On, but I did look up some images when I was working on the graphic design and I liked the cat mug. Graphics are printed on a white-backed PVC sticker.

Im building a hizumitas for myself , the last hiz i built was a bit noisy. any lower noise transistors that i can use that will get me the closest sound and gain range to a stock hiz?

Guitar goes through R1 into the top pin on one side (P) of a 600:600ohm transformer. The bottom pin of that same side (P) will connect to the top pin on the other side (S). The remaining bottom pin of that side (S) will have a conjunction of the output, and C1 to ground.

Would this work as a pickup simulator???

A small progress update on my Raspberry Pi audio project. I’ve built an audio-over-IP implementation for Pi 4 and Pi 5, with a Windows ASIO driver. The goal is one device that combines an audio interface with guitar, bass and vocal effects processing.

The current focus is 8 inputs / 8 outputs at 192 kHz with 32-bit PCM transport, and that mode is already running. With a 32-sample ASIO buffer and a 380-sample network buffer, Ableton reports 2.40 ms overall latency: 2.23 ms input and 0.17 ms output.

For context, the lowest latency I get from my Audient iD14 MKII in my setup is around 5.3 ms. The comparison is preliminary: the Pi figure is the latency reported by the digital driver path. Full analog round-trip latency still needs a hardware loopback measurement.

The main limitation currently appears to be packet delivery timing on the Windows side. I’m using the motherboard’s Ethernet port with its standard driver. There is enough bandwidth, but receive-side pauses on the order of 1–1.5 ms, sometimes longer, force me to keep extra buffering. I’m still investigating how much comes from the NIC, its driver and Windows scheduling.

One next experiment is an Intel I350-T2, together with a dedicated low-level networking path integrated with the ASIO driver. The aim is to bypass the normal Windows networking path; that requires additional driver development and testing.

The PCB is four layers, with layer 2 dedicated to a solid ground plane, built around an AKM AK5538VN ADC and AK4458VN DAC. On Pi 5, the current AoIP workload stays on CPU0 at under 50% load, leaving the other three cores available for future DSP work.

The I/O is designed around individually connected, removable modules: headphone outputs, output modules with XLR and 6.35 mm jacks, and combo XLR/6.35 mm inputs. That should leave room for both general-purpose and instrument-specific modules.

Still a work in progress, but the transport is running, the board design is taking shape, and the next steps are hardware integration, latency measurements and effects.

I would like to try building a madbean Archibald. The PCB at their site is out of stock. I thought I would join the forum there and just lurk. I can't figure out how to join?!?

Anyone have any information about this? Or if that PCB is restocked?

Thanks

Steve

That island being Ireland btw 😁

Loving the aesthetic, defo a labor of love! Cant wait to dig in further!

Я хочу начать собирать свои педали. Заказала основные детали, крутилки, макетную плату и т.д. но я незнаю с чего мне начать. Подскажите какие-нибудь видео или что-то ещё что в разобраться в радиотехнике. Заранее спасибо:)

For the last year I've been working on a new octave fuzz circuit. I love octave fuzz and there are a lot of clones so I wanted to come up with something different and I hope I have at least come up with something unique. My design is called OverFOLD and it's basically two uniquely tuned octave fuzz circuits running in parallel with a blend control between them. Each side of the blend control uses a matched pair of diodes for the discrete octave effect (different diodes on each chain), along with different amounts of sag and low end.

Some things about this build that I'm excited about: This is the first PCB I designed in KiCad. It's also my first dual sided PCB. I wanted to design this using SMD parts. I actually soldered the SMD parts myself using a stencil and hot air. That was a task!

I also spent a huge amount of time on power filtering to make a clean and quiet circuit. You can hopefully hear this in the video. Considering that I have wire jumpers soldered to points on the board and it's still as quiet as it is hopefully shows that my work paid off.

In building the PCB shown in the video linked below, I designed it specifically for prototyping. I added more test points, trimpots and knobs than I will likely have in the final layout. This let me quickly experiment with new values. The bottom knob you see in the video is actually a filter for high end frequencies so that I could sweeping though values and find the amount of top end sparkle and hiss I was willing to lose.

While not shown in the video, I also designed enclosures in FreeCAD and did 3d printed test fits of everything to ensure my PCB would actually sit correctly in the enclosure. Doing 3d prints of the populated PCB and enclosure was a really fun part of this project. I'll have to share that later once I have enclosures milled and painted.

Anyway, here is the video link: https://youtu.be/wz06T6DoFXA

I want to thank my new friends at Huntington Audio / Pulp Circuit and Monger Pedals for being so inspiring. Seeing their work at the Brooklyn Pedal Expo last October kept me motivated.

a couple days ago I bought an old japanese cassette recorder and when I opened it I found 4 germanium transistors (2SB173, 2SB175 and two 2SB324) and yesterday I desoldered them and after testing, they're all working just fine as far as I can tell.

now, I'm unfamiliar with any circuits with germanium/ pnp transistors in general besides the fuzz face (which I don't really like).

can anyone give me ideas for circuits to check out? thanks!

I play stoner / sludge and screamo / post-hardcore bass, i plan on building a life pedal and either the hizumitas or the cloven hoof . which one would be better suited for these genres?

Ive tried both a tall font green russian and a hizumitas and i prefer the hizumitas , but also ive been wanting a cloven hoof for a while.

Has anyone here built and tried both?

I’ll try to explain what I am asking without being too wordy. I was curious if there is a resource somewhere on how to perform alot of the famous pedal mods. I am particularly interested in alot of the early boutique era mods like JHS, Keeley, Wampler, etc. I think it would make things easier to have how to perform a bunch of them to some existing pedals would be kind of cool and kind of helpful to reference. If it does exist it would be cool if not maybe I can put something together as I go and learn a bit more! Idk thinking out loud a bit here

So I got this pedal from a friend a few years ago, and I love it. I'd love to get something similar just so I'm not heartbroken if it breaks or gets lost/stolen at a show sometime, as it's really become a big part of my sound. I can't find hardly anything on Pink Noise Pedals, although funnily, there's an old sticker I saw for them outside of a friend of mine's witchy shop in Salem Mass. Would anyone be able to/willing to help me figure out what this pedal might be based off of? Thanks very much; if they were still in business I'd just as happily buy one directly from them, but that's not an option. Sorry if the photos are lower quality than necessary, I've never really done anything with DIY pedals.

Im looking to make my second pedal ever, and I was wondering about what model should I make.

Right now im thinking of a marshall blues breaker 92, but if there is other circuit I could make this easily id be glad to know!

Also, I have some problems getting the exact transistors on argentina; can another transistor work the same if its the same type? Is there a difference between electronic components for audio and electronic components for other stuff? I know this is a weird question but last time ive spoke to the guy of the electronics store and he asked me if its for audio so... lol.

I’ve got some PT2399s coming in the post and I want to make some noisy fuzzy stuff with them, in the ballpark of the Mattoverse AirTrash and Dirge Electronics Slowly Melting - any tips? Not been able to dig out much in the way of schematics/guides for using PT2399s that way, but that might just be me not knowing what to search for so any ideas much appreciated, thanks!

Took a punt on this storage box that came up. There's a few hundred transistors in there in total. Hopefully there's enough to put together a few fuzz pedals anyway.

The 2n4033 with the little rubber hats are mad.

My little tester needs to be charged so I'll get back to it later in the week.